Tread bands for use in tyre retreading

Details Tread bands for use in tyre retreading Tread bands for use in tyre retreading

B - Operations, Transporting

29

D

18/186

B29D 30/52 (2006.01) B29D 30/06 (2006.01) B29D 30/24 (2006.01)

Patent

CA 1085116

ABSTRACT A sinker unit for preparing an annular unvulcanised tread band comprises an annular mould for supporting the tread band and an expandable annular sinker member for forcing the tread band against the inner surface of the mould. The sinker member includes side walls which are resiliently biassed outwardly so that the sinker member is maintained in a tensioned condition when it is forced against the tread band. The sinker member may be forced against the tread band by means of an expanding air bag underneath the sinker member.

275756

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